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An electron is initially at rest just outside a large copper surface that has a charge density of 1.04 x 10-6 C/m2. How far has the electron moved in 1.12 x 10-9 s if the field is uniform over this region? (Enter the magnitude only.)
A Ferris wheel with radius 14.0 is turning about a horizontal axis through its center, What is the magnitude of the passenger's acceleration as she passes through the lowest point in her circular motion
A 720gg , 50-cm-long metal rod is free to rotate about a frictionless axle at one end. While at rest, the rod is given a short but sharp 1000 N hammer blow at the center of the rod, aimed in a direction that causes the rod to rotate on the axle..
An electromagnetic plane wave at a certain location has an electric field pointed up which is given as a function of time as E = 54 V/m × sin (6x106 Hz × t). What is the Poynting vector at this location for this wave as a function of time
A 2kg box is released, from rest, at the top of a rough circular track of radius 10cm. calculate the work done by all resistive forces
A proton (mass 1.67 x 10^-27 kg) is moving at 1.30 x 10^-6 m/s directly toward a stationary helium nucleus (mass 6.64 x 10-27 kg ). what is the proton's velocity
The Hale Telescope The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9, What is the magnification of her image
a uniform electric field exists between two parallel plates separated by 2cm. if an electron of mass 9.1 e-31 kg is
Your friend Joe hangs from a horizontal bar by his two hands, with his arms each inclined 35 degrees from the vertical, what is the tension in each of his arms
question a household pays 1850 per year for the supplied electricity. assuming the rate of 0.11 per kwh and 10 hours of
A 10cm-diameter disk emits light uniformly from its surface. 20rm cm from this disk, along its axis, is an 8.0cm-diameter opaque black disk, What is the diameter of the completely dark part of this shadow
A Styrofoam ball of mass 0.120 g is placed in an electric field of6000 N/C pointing downward. What charge must be placed on the ball for it to be suspended?
An elastic cord vibrates with a frequency of 3.0 Hz when a .60 kg mass hangs from it. What would its grequency be if .38 kg hang from it?
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